①-÷-
②×+÷8
③(×27-)×
④÷[(+)×]
①-+-
②×+÷
③(6﹣1.3×4)÷0.1
④0.4×0.25×8×125
⑤3.4÷[(1.25+0.45)×23]
①21×16÷14+76
②9- -
③ ×0.8×12.5
④48×( + - )
⑤7.6×9.4- +7.6×1.6
⑥ ×[ ÷(0.4- )]
①1.7+3.98+5 +2.02
②13×50-618÷6
③(156× -26)×
④(1.5- )×(4- )
⑤
⑥
①38×12+189÷9
②7.83× -0.83×
③23.5÷(4.75-4.5× )
④3.62- +1.38-